Trying to settle this properly because the thread from last year went in circles. The claim: COA matters. The counter-claim: it is measurement error. Both sides have…
u/rania_okonkwo
Contributes reviews on supplier material. Based in Seville.
member · joined 14 May 2025
Overview — page 3 of 3
comment on chromatogram: what the trials say vs what this community says in c/hplc · 46 points · 1 year ago
Gradient goblin mode: changed the solvent composition 3 times, finally got good resolution on a LC-MS peak.
comment on switched from 12.5mg to 0.5mg and the injection-site soreness got better, not worse in c/coa · 350 points · 1 year ago
the method line is doing real work, not just window dressing
comment on switched from 12.5mg to 0.5mg and the injection-site soreness got better, not worse in c/coa · 537 points · 1 year ago
Water content was 3.8%, acetate was 6.2%, purity was 99%, but net peptide was only 90% of the label weight. Perfectly honest, just chemistry.
comment on switched from 12.5mg to 0.5mg and the injection-site soreness got better, not worse in c/coa · 63 points · 1 year ago
Strongly agree. Mass% and area% are answering different questions on the same document.
comment on [Discussion] we are measuring COA at the wrong time and calling it noise in c/coa · 19 points · 2 years ago
the related substances line is where the story is
comment on tried seizure for 7 weeks. here is what happened. in c/customs · -26 points · 2 years ago
Do you have an import allowance in your jurisdiction?
comment on [Lab] 16th independent test on BCH, and the trend is the interesting part in c/hplc · 89 points · 2 years ago
the gradient is doing the separation work, not the column alone
comment on [Results] 91 weeks on 5mg, full numbers, ask me anything boring in c/hplc · 181 points · 2 years ago
Every time this gets posted it hits the front page and every time someone has to re-explain it.